{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-73547",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-08-12T20:53:46.379Z",
        "datePublished": "2026-09-21T19:47:54.720Z",
        "dateUpdated": "2026-09-22T15:39:45.625Z"
    },
    "containers": {
        "cna": {
            "title": "Envoy ext_authz: request `:path` pseudoheader dereferenced w/o null check",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-20",
                            "lang": "en",
                            "description": "CWE-20: Improper Input Validation",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-476",
                            "lang": "en",
                            "description": "CWE-476: NULL Pointer Dereference",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-87ph-jqwm-pg6r",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-87ph-jqwm-pg6r"
                },
                {
                    "name": "https://github.com/envoyproxy/envoy/commit/064af2e61d0d1c421490d9e3e6e643c5d117ffe4",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/envoyproxy/envoy/commit/064af2e61d0d1c421490d9e3e6e643c5d117ffe4"
                },
                {
                    "name": "https://github.com/envoyproxy/envoy/commit/5f3b8e9b2b8a787a63202d35bb38820f3e9271fe",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/envoyproxy/envoy/commit/5f3b8e9b2b8a787a63202d35bb38820f3e9271fe"
                },
                {
                    "name": "https://github.com/envoyproxy/envoy/commit/838f8ffd9d7b5217682a22ee33470d4c7afb7e98",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/envoyproxy/envoy/commit/838f8ffd9d7b5217682a22ee33470d4c7afb7e98"
                },
                {
                    "name": "https://github.com/envoyproxy/envoy/commit/c3170d7c747e51bb8254378ea89afc03d3e71929",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/envoyproxy/envoy/commit/c3170d7c747e51bb8254378ea89afc03d3e71929"
                },
                {
                    "name": "https://github.com/envoyproxy/envoy/releases/tag/v1.36.10",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.36.10"
                },
                {
                    "name": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6"
                },
                {
                    "name": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4"
                },
                {
                    "name": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1"
                }
            ],
            "affected": [
                {
                    "vendor": "envoyproxy",
                    "product": "envoy",
                    "versions": [
                        {
                            "version": "< 1.36.10",
                            "status": "affected"
                        },
                        {
                            "version": ">= 1.37.0, < 1.37.6",
                            "status": "affected"
                        },
                        {
                            "version": ">= 1.38.0, < 1.38.4",
                            "status": "affected"
                        },
                        {
                            "version": ">= 1.39.0, < 1.39.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-21T19:47:54.720Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's ext_authz filter assumes that a request contains a :path pseudoheader when applying query_parameters_to_set or query_parameters_to_remove from an authorization response. A path-less CONNECT request makes request_headers_->Path() return null, and Filter::onComplete dereferences that pointer while parsing the query string. An unauthenticated downstream client can crash the Envoy process when the filter and authorization response use query-parameter mutation. The relevant scope boundary is that the deployment must accept path-less CONNECT and configure ext_authz query-parameter mutation. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1."
                }
            ],
            "source": {
                "advisory": "GHSA-87ph-jqwm-pg6r",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-22T14:15:38.926679Z",
                                "id": "CVE-2026-73547",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-22T15:39:45.625Z"
                }
            }
        ]
    }
}